private static Point[] GetPawnMoves(Point location, ChessPiece[,] board, PieceColor color)
{
int direction = color == PieceColor.White ? -1 : 1;
List <Point> locations = new List <Point>();
Point[] directions = //relative to direction
{
new Point(0, direction), //forward one step
new Point(0, direction * 2), //forward two steps
new Point(direction, direction), //forward left
new Point(-direction, direction) //forward right
};
Point dir = location + directions[0];
if (board.WithinBounds(dir) && board[dir.X, dir.Y].type == PieceType.None)
{
locations.Add(dir);
dir = location + directions[1];
if (board.WithinBounds(dir) &&
board[dir.X, dir.Y].type == PieceType.None &&
((direction < 0 && location.Y == 6) || location.Y == 1) && !ContainsFriend(board, dir, color) && !ContainsEnemy(board, dir, color))
{
locations.Add(dir);
}
}
//capturing
dir = location + directions[2];
if (board.WithinBounds(dir) && ContainsEnemy(board, dir, color))
{
locations.Add(dir);
}
dir = location + directions[3];
if (board.WithinBounds(dir) && ContainsEnemy(board, dir, color))
{
locations.Add(dir);
}
return(locations.ToArray());
}
private static Point[] GetJumps(Point location, Point[] offsets, ChessPiece[,] board, PieceColor color)
{
List <Point> locations = new List <Point>();
for (int i = 0; i < offsets.Length; i++)
{
Point sampleLocation = location + offsets[i];
if (board.WithinBounds(sampleLocation) && !ContainsFriend(board, sampleLocation, color))
{
locations.Add(sampleLocation);
}
}
return(locations.ToArray());
}
private static Point[] GetPaths(Point location, Point[] directions, ChessPiece[,] board, PieceColor color)
{
List <Point> locations = new List <Point>();
for (int i = 0; i < directions.Length; i++)
{
Point sampleLocation = location + directions[i];
while (board.WithinBounds(sampleLocation) && !ContainsFriend(board, sampleLocation, color))
{
locations.Add(sampleLocation);
if (ContainsEnemy(board, sampleLocation, color))
{
break;
}
sampleLocation += directions[i];
}
}
return(locations.ToArray());
}